Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cam thuc » am thuc, nam thuc, cam thu
va thanh » gia thanh, va tinh, le thanh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. ((lieu va) or (hieu qua)) cam thuc ((va thanh) OR (ban thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((lieu va) OR (hieu qua)) cam thuc ((va thanh) OR (ban thanh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. ((lieu va) or (hieu qua)) cam thuc ((va thanh) OR (ban thanh)) vi cua tre*".